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1. Which river flows through Cologne?
2. Of which german state is Cologne the largest city?
3. Which famous Cologne landmark was built over six centuries?
4. What's the Eau de Cologne, one of the city's most renowned products?
5. Of which trade confederation was Cologne a major city?
6. Which german chancellor was born in Cologne, as well as being the city's mayor for 16 years?
7. Which major german company has its headquarters in Cologne?
8. What's Cologne's rival city?
9. Which animal is the symbol of Cologne's football team, 1. FC Köln?
10. Which Cologne festival is one of the largest of its kind in Europe?